/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:44:02,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:44:02,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:44:02,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:44:02,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:44:02,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:44:02,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:44:02,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:44:02,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:44:02,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:44:02,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:44:02,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:44:02,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:44:02,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:44:02,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:44:02,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:44:02,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:44:02,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:44:02,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:44:02,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:44:02,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:44:02,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:44:02,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:44:02,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:44:02,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:44:02,458 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:44:02,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:44:02,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:44:02,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:44:02,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:44:02,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:44:02,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:44:02,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:44:02,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:44:02,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:44:02,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:44:02,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:44:02,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:44:02,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:44:02,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:44:02,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:44:02,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:44:02,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:44:02,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:44:02,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:44:02,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:44:02,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:44:02,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:44:02,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:44:02,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:44:02,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:44:02,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:44:02,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:44:02,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:44:02,751 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:44:02,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2-ll.c [2021-05-02 13:44:02,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7768c0c33/8fc9d917455a46dab6e84574f9809a32/FLAG1f18c860f [2021-05-02 13:44:03,244 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:44:03,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2-ll.c [2021-05-02 13:44:03,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7768c0c33/8fc9d917455a46dab6e84574f9809a32/FLAG1f18c860f [2021-05-02 13:44:03,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7768c0c33/8fc9d917455a46dab6e84574f9809a32 [2021-05-02 13:44:03,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:44:03,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:44:03,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:44:03,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:44:03,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:44:03,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b174ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03, skipping insertion in model container [2021-05-02 13:44:03,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:44:03,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:44:03,451 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2-ll.c[525,538] [2021-05-02 13:44:03,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:44:03,470 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:44:03,488 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2-ll.c[525,538] [2021-05-02 13:44:03,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:44:03,523 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:44:03,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03 WrapperNode [2021-05-02 13:44:03,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:44:03,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:44:03,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:44:03,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:44:03,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... [2021-05-02 13:44:03,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:44:03,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:44:03,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:44:03,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:44:03,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:44:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:44:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:44:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:44:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:44:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:44:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:44:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:44:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:44:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:44:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:44:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:44:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:44:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:44:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:44:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:44:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:44:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:44:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:44:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:44:03,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:44:03,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:44:03,892 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:44:03,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:44:03 BoogieIcfgContainer [2021-05-02 13:44:03,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:44:03,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:44:03,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:44:03,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:44:03,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:44:03" (1/3) ... [2021-05-02 13:44:03,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b28f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:44:03, skipping insertion in model container [2021-05-02 13:44:03,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:03" (2/3) ... [2021-05-02 13:44:03,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b28f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:44:03, skipping insertion in model container [2021-05-02 13:44:03,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:44:03" (3/3) ... [2021-05-02 13:44:03,899 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll.c [2021-05-02 13:44:03,927 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:44:03,931 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:44:03,944 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:44:03,960 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:44:03,961 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:44:03,961 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:44:03,961 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:44:03,961 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:44:03,961 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:44:03,961 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:44:03,961 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:44:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:44:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:44:03,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:03,976 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:03,977 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 1 times [2021-05-02 13:44:03,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:03,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140356795] [2021-05-02 13:44:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:04,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:44:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:44:04,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:04,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140356795] [2021-05-02 13:44:04,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140356795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:44:04,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:44:04,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:44:04,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737181364] [2021-05-02 13:44:04,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:44:04,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:04,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:44:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:44:04,255 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:04,314 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-02 13:44:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:44:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:44:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:04,323 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:44:04,323 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:44:04,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:44:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:44:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 13:44:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:44:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 13:44:04,363 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-05-02 13:44:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:04,363 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 13:44:04,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 13:44:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:44:04,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:04,365 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:04,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:44:04,366 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 1 times [2021-05-02 13:44:04,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:04,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003891376] [2021-05-02 13:44:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:04,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:04,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269425222] [2021-05-02 13:44:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:04,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:44:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:44:04,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:04,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003891376] [2021-05-02 13:44:04,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:04,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269425222] [2021-05-02 13:44:04,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269425222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:44:04,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:44:04,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:44:04,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243902281] [2021-05-02 13:44:04,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:44:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:44:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:44:04,600 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:04,646 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 13:44:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:44:04,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:44:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:04,648 INFO L225 Difference]: With dead ends: 26 [2021-05-02 13:44:04,648 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:44:04,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:44:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:44:04,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:44:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:44:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 13:44:04,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-02 13:44:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:04,671 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 13:44:04,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 13:44:04,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:44:04,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:04,671 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:04,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:44:04,889 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1366100723, now seen corresponding path program 1 times [2021-05-02 13:44:04,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:04,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141927170] [2021-05-02 13:44:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:04,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:04,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068277605] [2021-05-02 13:44:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:44:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:05,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:05,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:44:05,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141927170] [2021-05-02 13:44:05,087 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068277605] [2021-05-02 13:44:05,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068277605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:05,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:05,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:44:05,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423494304] [2021-05-02 13:44:05,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:44:05,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:05,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:44:05,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:44:05,090 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:44:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:05,194 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-05-02 13:44:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:44:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 13:44:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:05,196 INFO L225 Difference]: With dead ends: 33 [2021-05-02 13:44:05,196 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:44:05,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:44:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:44:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:44:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:44:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-02 13:44:05,212 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-05-02 13:44:05,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:05,212 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-02 13:44:05,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:44:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-02 13:44:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:44:05,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:05,213 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:05,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:05,435 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:05,435 INFO L82 PathProgramCache]: Analyzing trace with hash 673668341, now seen corresponding path program 2 times [2021-05-02 13:44:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:05,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897705477] [2021-05-02 13:44:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:05,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:05,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469017403] [2021-05-02 13:44:05,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:05,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:44:05,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:44:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:44:05,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:05,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:05,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:44:05,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:05,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897705477] [2021-05-02 13:44:05,668 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:05,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469017403] [2021-05-02 13:44:05,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469017403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:05,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:05,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:44:05,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903227598] [2021-05-02 13:44:05,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:44:05,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:44:05,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:44:05,693 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:44:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:13,887 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 13:44:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:44:13,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 13:44:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:13,889 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:44:13,889 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:44:13,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:44:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:44:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 13:44:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 25 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:44:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 13:44:13,897 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 25 [2021-05-02 13:44:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:13,898 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 13:44:13,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:44:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 13:44:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:44:13,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:13,899 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:14,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:14,105 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash -244910256, now seen corresponding path program 1 times [2021-05-02 13:44:14,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:14,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501383406] [2021-05-02 13:44:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:14,115 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:14,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990646731] [2021-05-02 13:44:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:14,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:44:14,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:14,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:14,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 13:44:14,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:14,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501383406] [2021-05-02 13:44:14,299 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:14,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990646731] [2021-05-02 13:44:14,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990646731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:14,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:14,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:44:14,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036515836] [2021-05-02 13:44:14,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:44:14,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:14,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:44:14,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:44:14,301 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 13:44:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:16,419 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 13:44:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:44:16,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-05-02 13:44:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:16,422 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:44:16,422 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:44:16,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:44:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:44:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 13:44:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:44:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 13:44:16,429 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-05-02 13:44:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:16,429 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 13:44:16,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 13:44:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 13:44:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:44:16,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:16,430 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:16,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:16,653 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1026670605, now seen corresponding path program 3 times [2021-05-02 13:44:16,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:16,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302734105] [2021-05-02 13:44:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:16,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:16,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675882157] [2021-05-02 13:44:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true